Interactive Brokers Group, Inc. — Director's Dealing 2026

Jan 26, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Interactive Brokers Group, Inc. (IBKR)
CIK: 0001381197
Period of Report: 2025-12-31

Reporting Person: Conkling Lori A (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-31	Class A common stock	A	389	—	Acquired	1945	Direct
2026-01-01	Class A common stock	A	389	$64.31	Acquired	2334	Direct

Footnotes

F1: On January 22, 2026, Interactive Brokers Group, Inc.'s ("Issuer") Board of Directors ("Board") modified the compensation policy for members of the Board. The Issuer's Board, under the 2007 Stock Incentive Plan as amended ("Plan"), increased the one-time award granted to external directors on December 31 of the year of appointment from $75,000 to $100,000, retroactive to December 31, 2025. This represents additional restricted stock units granted to the Reporting Person, under the Plan, which will vest in five equal installments, beginning December 31, 2026.

F2: This amount includes (a) Class A common stock attributable to vested restricted stock units that were awarded under the Plan and (b) unvested restricted stock units that were awarded under the Plan.

F3: The Issuer's Board also increased the annual awards granted to all directors on December 31 of each year, under the Plan, from $25,000 to $50,000. This represents additional restricted stock units granted to the Reporting Person, under the Plan, which vested on January 1, 2026.

F4: The price represents the closing price of the Issuer's Class A common stock on December 31, 2025.